In the Project Europa thread, it is stated (even in the title) that the voltage is planned to be 240V, but as others had pointed out, the standard voltage in Europe (and much of the world, though I am not sure if most, for reasons that will be clear soon) is ~230V (and in practice, you can find anywhere from 210V~260V, due to how AC is not fixed, and how ~400V is split into 3 ~230V phases).
I had pointed out while talking about the different box standards and modularity, that many countries use the same, or almost the same, boxes (and some even the same sockets and plugs) as the US, but with different voltages, so I ask, do Inovelli’s products need to support only specifically narrow voltage ranges, or whether the methodology employed by some socket/outlet manufacturers that manufacture products for international markets, and just manufacture the switches to the entire range, or two ranges, that encompass every market would be better?
If the latter, it would make even more sense to modularise the actual mechanism, which would allow the entire manufacturing process to be more streamlined, since the switch module would be the same for every market (and will allow supporting markets such as many of those in South America, amongst others), and only the frame and plates (both for the frame and for the switches) be different, according to which market they will go to.
And on the matter, 50/60Hz is also important, for the same reasons, being that some countries use ~120V50Hz, some ~120V60Hz, some ~230V50Hz and some ~230V60Hz (you can replace the voltages with 90V, 100V, 110V, 125V, 127V, 200V, 220V, 240V or even 250V, again, depending upon the country), and some even use both frequencies (such as Japan’s 100V (yes, 100V, not 110V or 120V) being either 50Hz in the eastern half or 60Hz in the western half).